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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Controls - Self-Diagnostics - 1.8L - XE, GXE) >> Diagnostic Tests >> DTC P0327 Or DTC P0328 >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit wiring diagram, see Fig 1 . For connector identification and locations, see CONNECTOR IDENTIFICATION  .

  1. Retighten Ground Screws

    Turn ignition off. Loosen and retighten engine ground bolts. See Figure . Go to next step.

  2. Check Input Signal Circuit

    Disconnect knock sensor and ECM harness connectors. See Figure and Fig 2 . Check continuity between knock sensor harness connector terminal No. 1 and ECM harness connector terminal No. 81. See Fig 1 . Continuity should exist. Also, check harness for short to ground and short to power. If problem is found, repair as necessary. Perform DTC CONFIRMATION TEST  to verify repair. If problem is not found, go to next step.

  3. Check Knock Sensor

    Measure resistance between ground and knock sensor terminal No. 1 (component side). See Fig 3 . Resistance should be 500-620 k/ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, replace knock sensor. Perform DTC CONFIRMATION TEST  to verify repair.

  4. Check For Intermittent

    Check for intermittent condition. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. Perform DTC CONFIRMATION TEST  to verify repair.
Fig 1: Knock Sensor Wiring Diagram
G00164627Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Locating Knock Sensor
G00014352Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Testing Knock Sensor
G00014353Courtesy of NISSAN MOTOR CO., U.S.A.
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